<template>
	<view>
		<!-- 搜索框 -->
		<view class="search-box">
			<uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		
		<!-- 搜索显示页面 -->
		<view class="sugg-list" v-if="searchResults.length!==0">
			<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<view>搜索历史</view>
				<uni-icons type="trash" size="17" @click="clean()"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodList(item)"></uni-tag>
			</view>
		</view>
		
		
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				//搜索的结果列表
				searchResults:[],
				//搜索历史
				historyList:['a','b','c']
			};
		},
		methods:{
			onLoad(){
				this.historyList=JSON.parse(uni.getStorageSync('kw')||'[]')
			},
			input(e){
				clearTimeout(this.timer)
				this.timer=setTimeout(()=>{
					this.kw=e
					this.getSearchList()
				},500)
			},
			async getSearchList(){
				//判断搜索关键词是否为空
				if(this.kw.length===0){
					this.searchResults=[]
					return
				}
				const {data:res}=await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
				if(res.meta.status!=200) return uni.$showMsg()
				this.searchResults=res.message
				
				//将关键字存入数组中
				this.saveSearchHistory()
			},
			gotoDetail(item){
				
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
				})
			},
			//搜索列表的跳转
			gotoGoodList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+kw
				})
			},
			//将搜索记录存入数组中
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				//1,将array数组转为set对象
				const set=new Set(this.historyList)
				//2,调用set对象的delete方法,移出对应的元素
				set.delete(this.kw)
				//3,调用set对象的add方法,向set中添加对象
				set.add(this.kw)
				//4,将set对象转为array数组
				this.historyList=Array.from(set)
				//调用uni.setStorageSync(key,value)将搜索历史纪录持久化存储到本地
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			//清除搜索记录
			clean(){
				this.historyList=[]
				uni.setStorageSync('kw','[]')
			}
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
	.search-box{
		position: sticky;
		top: 0;
		z-index: 999;
	}
	.sugg-list{
		padding:0 5px;
		
		.sugg-item{
			display: flex;
			align-items: center;
			justify-content: space-between;
			font-size: 12px;
			padding:13px 0;
			border-bottom: 1px solid #efefef;
			.goods-name{
				//文字不允许换行
				white-space: nowrap;
				//溢出部分隐藏
				overflow:hidden;
				//文本溢出后用...代替
				text-overflow: ellipsis;
				margin-right: 3px;
				
			}
		}
	}
	.history-box{
		padding: 0 5px;
		.history-title{
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}
		.history-list{
			display: flex;
			flex-wrap: wrap;
			.uni-tag{
				padding:0 16px;
				height: 30px;
				line-height: 30px;
				background-color: #F8F8F8;
				justify-content: center;
				border-radius:6rpx;
				border-width:1rpx;
				border-style:solid;
				border-color:#f8f8f8;
				margin-top:5px;
				margin-left:5px
			}
			.uni-tag--default{
				color:#333;
				font-size: 28rpx;
			}
		}
	}
	
</style>
